Locking device



Dec. 16, 1941. F. ADAM LOCKING DEVICE Filed March 25, 1959 3Sheets-Sheet l Inventor-z Dec. 16, 1941. ADAM LOCKING DEVICE Filed March25, 1939 5 Sheets-Sheet 2 Invernor:

Patented Dec. 16, 1941 .UNETED STATES QFFECE LOCKING DEVICE Folger Adam,Joliet, Ill.

Application March 25, 1939, Serial No. 264,087

12 Claims.

This invention relates to improvements in looking devices, especiallyfor locking swinging or sliding doors and the like. The locking devicesherein disclosed are especially intended for the locking and control ofthe doors of cells or confinement or treatment rooms of suchinstitutions as jails, houses of correction, etc., and the constructionsherein illustrated and described have been designed especially to meetthe conditions of use and operation imposed by such installation, and Ishall describe certain of the operations of the looking devices in suchuse; but in so doing I Wish it understood that I do not intend tothereby limit the scope of the invention, except as I may do so in theclaims.

The locking devices herein disclosed are intended for installationswherein several locking and unlocking operations are possible. Thearrangements are such that the lock bolt may be withdrawn either locallyat the position of the lock, as by the use of a key, or remotely, as bythe use of suitable mechanical or electrical devices; and are such thatunder certain conditions the lock bolt may be deadlocked by remotecontrol so that said bolt may not then be withdrawn locally even by theuse of a key. The arrangements are also such that the lock bolt may bemoved into either of two locking positions, in either of which positionsthe door is locked. In the first of these two positions the bolt movesto a snap lock position, and in the other of these two positions thebolt moves to a position such that the door cannot be snapped shut, andalso such that the deadlocking operation may be performed. The bolt maybe moved into these positions, or may be withdrawn to unlock the door,by key operations performed at the lock position. Such key operationsrequire the rotation of the key and cylinder for one complete rotationin the looking direction (to bring the bolt to the deadlocked position),or a quarter turn in the locking direction to unlock the bolt by keyoperation, and are therefore of an unusual nature.

The remote control operations of the locking bolt are performed bymovements of a lock bar which extends through or in proximity to thelock casing. When the bolt is in its snap locked position it may bewithdrawn to unlock the door by movement of this look bar, but when thelock bolt is in its fully extended or deadlocked position it is notoperated by the lock bar, which then rides free of the lock bolt.

One feature of the present invention relates to the provision of a keyoperated lock of such construction that the bolt thereof normally standsin the snap locked position and may be moved by key rotation or movementinto a further projected locking position; and which construction issuch that the lock bolt may be withdrawn into unlocked position by abackward turn of the key and cylinder. In connection with the foregoingfeatures I have provided an improved form of pin tumbler arrangement forthe cylinder, which pin tumbler construction serves to lock the cylinderagainst rotation until the proper or authorized key has been insertedinto the key opening. Pin tumbler locks have heretofore been known, butthey were of a construction in which the cylinder for the key wascarried within an enclosing or encircling sleeve, so that the pins ofthe key cylinder could not slip or drop out from the key cylinder, butwere at all times confined by said sleeve. Due to the fact that I findit necessary to make provision for making one complete rotation of thekey cylinder in order to perform certain of the operations of the lockbolt, and the further fact that certain bolt operations are controlledby the key cylinder by means of lever tumblers it is not feasible to usesuchsleeve construction of the prior art, and I have therefore found itdesirable to make special provision for retaining the pins in the keycylinder when the latter is rotated away from the position of the pintumbler block during the several key cylinder operations.

It is therefore an object of the invention to provide means forretaining the pins in the key cylinder independently of any surroundingsleeve, and independently of the companion tumbler block, so that thecylinder pins are retained within the key cylinder at all times, andconstitute a self-contained unit therewith.

In connection with the pin tumbler arrangement, wherein the cylinderpins oo-operate with the tumbler pins of the pin tumbler block forunlocking purposes, it is a further feature of the invention to providean arrangement such that proper co-operation between these sets of pinswill be ensured at all times, and regardless of slight inaccuracies ofmanufacture or assembly. When the key is inserted into the key slot oropening the serrations or openings on the back edge of the key serve toproject the cylinder pins outwardly against their respective tumblerpins carried in the pin tumbler block,so as to align the tumbler pinsand allow the key cylinder to be rotated. I-Ieretofore it has beencustomary to provide contacting surfaces between the key cylinder. and

the companion face of the tumbler pin block, and to carry the pin holesof the key cylinder and of the pin tumbler block to such surfaces; andas a result of this arrangement it has been heretofore necessary tosecure exact alignment of the holes of the key cylinder and of the pintumbler block in order to secure proper functioning of the pins. In caseof nonalignment of these pin holes the tumbler pins could not enter intothe pin holes of the key cylinder when the key was withdrawn, andconsequently no locking action would occur.

It is therefore an object of the present invention to provide companionslots or enlarged portions on the companion surfaces of the key cylinderand the pin tumbler block, so that even in case of misalignment of thekey cylinder with respect to the pin tumbler block, or vice versa, or incase of slight inaccuracies of placement of the key cylinder lengthwisewith respect to the pin tumbler block, the pin tumblers may neverthelessbe projected into the companion slot of the key cylinder and performlocking function to prevent rotation of the key cylinder until a properkey is inserted thereinto.

The foregoing feature is of further importance in connection with theconstruction herein disclosed wherein the key cylinder is carried at oneend in the lock case, and at its other end in the removable cover plateof the lock case, and wherein the pin tumbler block is carried by thecover plate. In such construction it follows that during manufacture andassembly of the parts slight inaccuracies will have to be provided forand compensated for, and the arrangement or feature above referred tomakes provision for such compensation.

A further feature of the invention relates to the forms of thecontacting ends of the pins in the key cylinder and in the pin tumblerblock. --i

Heretofore it has been customary to form these contacting ends of arounded form, rounded around the pin axis, so that theoretically eachkey cylinder pin and the companion tumbler pin could make only a singlepoint of contact together. As a result, the pins ends have been found towear rapidly, and such wear would in time result in improperfunctioning, since the cylinder pin must be projected exactly the properdistance to cause unlocking of the tumbler pin when the key is insertedinto the cylinder. My improvement in respect to this feature consists inthe provision of pins having ends which are formed on flattened orstraight line surfaces so that contact of each pin of the key cylinderwith the companion pin of the pin tumbler block may occur anywhereacross the entire width of the pin, and on a surface of contact asdistinguished from a point of contact, as heretofore. I also providecylindrical end surfaces on the inner ends of the key pins, saidsurfaces extending across the direction of movement of the key duringinsertion or withdrawal of the key from its slot, thus improving theaction and also providing a line of contact between each pin and the keyinstead of a single point of contact as heretofore.

In order to prevent the pins from turning on their own axes I make useof the retaining pins which engage the pins of the key cylinder andlikewise the retaining pins which engage the tumbler pins of the pintumbler block (when used), to not only retain the cylinder pins and thetumbler pins in place within the cylinder and the pin tumbler block,respectively, but also to retain the said pins against rotation, so thatthe cylindrical contacting ends of the key pins will be retained inproper positions at all times with respect to the direction of keyinsertion or withdrawal.

A further feature of the present invention relates to an improvedarrangement for remotely operating the lock bolt for unlocking purposes,by electrical means or the like. In this connection it is an object toprovide means whereby when an unlocking impulse is imparted to the lockstructure so that the lock bolt is momentarily Withdrawn into theunlocking position, it will be retained in said unlocked position atleast until such time as the door has been opened sufficiently toprevent re-engagement of the lock bolt with the catch on the door edge.Nevertheless, the arrangement is such that as the door is opened beyondsuch position the lock bolt will be again released so that it will be inposition to snap lock the door when the door is again moved to the fullyshut position. This feature is of value especially in connection withthe use of door starters which serve to start the door opening movementwhen the lock bolt is drawn into the unlocking position, since therebyit is only necessary to deliver a short impulse of current to the lockoperating solenoid (or other device), which impulse will then place theparts in such posi tion that the door opening movement may commence, andit is thus unnecessary to continue the delivery of current (or otherforce) until the door opening movement has been completed. Nevertheless,as the door opening movement continues the parts will be replaced in theproper condition for the ensuing locking operation at a subsequent time.

In connection with the remote control of the lock bolt movements, thearrangement may be such as to cause said movements either electrically,or by means of mechanical instrumen talities, such as flexible wires orcables, etc.

Other objects and uses of the invention will appear from a detaileddescription of the same, which consists in the features of construction,and combinations of parts hereinafter described and claimed.

In the drawings: a Figure 1 shows an elevational face view of lockingdevice embodying the features of the present invention as used forlocking a swinging door, with provision for remote control and actuationof the lock bolt by means of a gang bar from a remote station, the coverplates being removed to better show the interior constructions;

Figure 2 shows a vertical section on the line 2--2 of Figure 1 lookingin the direction of the arrows;

Figure 3 shows a horizontal section on the line il3 of Figure 1 lookingin the direction of the arrows;

Figure 4 shows a face view of a modified form of the locking deviceproper, with the cover plate removed, the device of this form of theinvention being provided for remote control and operation by electricalmeans, and being provided with the means whereby an impulse of momentarynature will serve to move the lock bolt to the unlocked position whereit will be temporarily held by suitable restraining means until thefurther opening movement of the door serves to release such restrainingmeans and permit the lock bolt to again be projected into the snap lockposition;

Figure shows a vertical section on the line 5-. 5 of Figure 4, lookingin the direction of the arrows, the cover plate and parts being inposition;

Figure 6 shows a horizontal section on the line 66 of Figure 4 lookingin the direction of the arrows;

Figure 7 shows a section on the line of Figure 4 but on enlarged scale,and with the cover plate in position;

Figure 8 shows an inside face view of the cover plate of the lock box,with the pin tumblers and lever tumblers shown in position, being asection on the line 8-8 of Figure 7 looking in the direction of thearrows;

- Figure 9 shows a fragmentary section through the key cylinder and theadjacent portions of the pin tumbler block and the pins and pintumblers, on still further enlarged scale;

, Figure 10 shows a fragmentary section of the line lfl-lfl of Figure 9,looking in the direction of the arrows;

Figure 11 shows a cross-section on the line Il -ll of Figure 10, lookingin the direction of the arrows, and shows a typical arrangement of theretaining pin, and its relation to a pair of the key cylinder pins; and

Figure 12 shows a side face view of one of the key pins removed from thekey cylinder, being a view thereof at right angles to Figure 10.

This application is a continuation in part of my co-pen'ding applicationfor improvements in Jail locking devices and the like, Serial No.116,530, filed December 18, 1936.

Referring first to Figures 1, 2 and 3, the arrangement therein disclosedis one in which the lock of the present invention is used in connectionwith a swinging door, and in which the lock bolt may be controlled andoperated either 10-- cally by means of a suitable key, or remotely bymeans of a control and operating bar from a distant station. Theswinging door or gate is designated by the numeral 20. It is suitablyhinged at its right hand edge (not shown), and may swing towards theobserver during the opening operation. The locking device of the presentinvention is intended for placement on the door jamb, shown generally bythe numeralZl. The edge 22 of the door carries the usual or modifiedform of socket 23 which is engaged by the lock bolt when the door isclosed and retained in closed position by such lock bolt.

The lock of the present invention is designated generally by the numeral24. It includes the case or housing 25 (the cover plate being removed inr The lock bolt 26 is slidingly mounted Figure 1). in this case, and hasa beveled end'portion for snap engagement with the socket 23. Normallythe bolt is projected to the position of the line 21, for snap lockingpurposes, and in such pro- I jected position its beveled end portion canslide cylinder has the wing 32 which works in a suitable recess of thebolt; and the bolt has the two notches 33 and 34 which may be engaged bythis wing. With the bolt in the normal projected position (to the line21), rotation of the key cylinder and wing 32 counterclockwiseone-quarter rotation (or part) will withdraw the bolt to the unlockedposition against the spring, and allow the door to be opened. On thecontrary, rotation of the key cylinder and wing 32 in the clockwisedirection one turn will permit the bolt to be projected to the'positionof the line 28 (assumingthat the gates of the lever tumblers have beenplaced in proper position).

The case or cover also carries the pin 35 on which the lever tumblerssuch as 36 are pivoted, each such lever tumbler having a spring 31 whichnormally urges it to the lowered position shown in Figure l. The boltcarries the lug 38 which can ride back and forth through the gates 39 ofthe lever tumblers, when said tumblers are properly aligned for thatpurpose. also carries a pin tumbler block which co-operates with keypins ofthe'key cylinder in the manner to be presently explained.

It will now be seen that by counterclockwise rotation of the keycylinder the bolt may be withdrawn to the unlocked position (assumingthat the bolt was in the normal or snap-locked position defined by theline 21) and without the need of the lug 38 passing through the gates;but when it is desired to throw the bolt out to the deadlocked positiondefined by the line 28 it is necessary to throw the lever tumblersupwards to align their gates with the lug 38 so that said lug may passthrough the gates, and lie to the outside of the fingers 40 of the levertumblers. Then when said lever tumblers are allowed to lower saidfingers will stand at the left side of the bolt lug 38 and thereby locksaid bolt against unlocking movement as long as the lever tumblers arein lowered position.

Behind the bolt 26 (that is, against the bottom face of the case) thereextends vertically the operating bar 4|. This bar extends to the outsideof the case, and connects to suitable operating and controllinginstrumentalities. This bar 4| has a lateral projection carrying theroller 42; and on the back face of the lock bolt 26 there is the wedgeshaped block 43. The cam or wedge face of this block is in position tobe engaged by the roller 42 when the bar 4| is raised, as will beevident from examination of Figure l. The

raising of the bar 4| will therefore serve to withdraw the lock bolttowards the left or unlocking position against the spring 29. Thisrelationship is true when the bolt stands in the normal or springprojected locking position so that the proper relationship is maintainedbetween the roller 42 and the wedge block 63. It is not true,

however, when the lock bolt is projected to the deadlocked positiondefined by the line 28.

VJhen the lock bolt stands in the deadlocked position defined by theline 28, the roller will ride to the left of the wedge block 43, and nocooperation between these parts will occur, and the raising and loweringof the bar 4| will be ineffective as far as the lock bolt 26 isconcerned.

The controlling or operating bar 4| may be moved in any convenientmanner. In the arrangement'shown in Figures 1, 2 and 3 the bar 4| isconnected to the lower end of a rod 44' which in turn connects to abell-crank 45 located above the door position; and a suitable ,gang barl6 isvprovided for simultaneous operation and control of a number ofdoor locks, in any convenient manner. A spring 41 is shown for urgingthe rod 44 and bar 4| downwardly, if

necessary.

. Next, referring to Figures 4, 5 and 6, I have The cover therein showna modified arrangement wherein provision is made for an electricaloperation and control of the bar 4|. In this case the lock case has beencarried up to provide a supplemental chamber or housing 48 above thenormal lock case; and either a single cover plate 49 may be used toserve both the lock case and the chamber 48, or separate covers may beprovided for them individually. Within the chamber 48 is located asolenoid 50, carried by brackets 5| connected to the housing, andcurrent for the solenoid is supplied through the lines 52 and 53 fromany suitable source and from a suitable remote station. The verticallymovable armature 54 of this solenoid is connected by the pin 55 to thebar 4| so that the up and down movements of the armature arecommunicated to the bar 4|. Thus the energizing of the solenoid from aremote station will serve to raise the bar 4| for the lock boltoperations and control heretofore explained.

Now it will be evident that with the arrangements so far detailed thebar 4| will fall as soon as the solenoid is no longer energized, so thatin case of a momentary or short supplying of current the bar 4| mightfall before the door had been opened, and the unlocking would be of noavail. In other words, with the arrangement so far explained it isnecessary to continue to supply current to the solenoid until the doorhas been opened at least far enough to prevent the lock bolt fromre-engaging the socket 23. I have, however, provided means to retain thelock bolt in the withdrawn position, once the solenoid has beenenergized (or the bar 4| raised), until such time as the door has openedto a point where the lock bolt will not re-engage the socket 23,whereupon the lock bolt will be again released and be replaced in itscondition for snap-locking operation, such means being as follows:

Beneath the lock bolt position, and adjacent to the lower end of the bar4| is the cross-wise extending bar 56. This bar is normally spring urgedoutwardly by the spring 51, and at its outer end this bar carries theroller 58. Such roller is mounted on a vertical axis so that it willproperly engage and function against the edge portion of the door duringthe door opening move-- ments. This bar 56 also carries a roller 59which may ride against the adjacent edge of the bar 4|, as said bar israised, or said roller 59 may move to a position beneath the lower endof the bar 4| when the said bar 4| is raised. In this latter positionsaid roller will prevent the bar from falling even when the solenoid hasbeen deenergized (or other restraining force removed).

Referring to Figure 6 it will be noted that the edge portion of the dooris provided with a notch or recess 60 in line with the bar 56, and intowhich the roller 58 works. This recess is defined by the front and backcam surfaces GI and 62, respectively, and when the bar 56 is projectedoutwardly by the spring 51 at the completion of the upward movement ofthe bar 4|, the roller will stand in the recess 60. Then, as the doormoves open to a position such that the lock bolt could no longer enterinto the socket 23, the cam surface 62 will strike the roller, forcingback the bar 56 and roller 59 to a point to one side of the bar 4|,thereby again allowing the bar 4| to fall into its normal position(unless, of course, the solenoid 50 should still be energized). In casethe solenoid should be energized after the door has been thus openedbeyond the position of the roller 58, so that the bar 41 should be againor still in raised position with the roller 59 beneath its lower end,the subsequent shutting of the door will cause the back face 64 of thedoor edge to engage the roller 58 and thereby force the bar 56 back soas to release the bar 4|, whereupon said bar will fall in the samemanner.

In Figure 6 I have shown a door starter including the pin 65 which isguided by the bracket 66, and a spring 51 urges the pin 65 outwardlyagainst the door for door starting purposes. Such a door starter, or anyother suitable type, is desirable in connection with the electric remotecontrol for the door lock, since thereby a short impulse of currentdelivered to the solenoid will ensure door opening movement so that thecam face 62 may ride against the roller 58 and thus ensure resetting thebars 56 and 4| in the manner already explained.

Referring now to Figures '1, 8, 9, 10 and 11 I will explain more indetail the construction of the pin and lever tumbler arrangementshereinbefore mentioned. The key cylinder 30 has the specially shaped keyslot 68 with suitable ridges and grooves, and the key is similarlyformed to slide into such key slot. Within the lock case the keycylinder has an enlargement 69, and at one side the key slot reachesinto this enlargement as shown in Figures 8 and 9, for example. Thelever tumblers ride against this enlargement (or slots or groovestherein), so that as the key is rotated the lever tumblers are at theproper times raised to position to bring the gates 39 into alignmentwith the lug 38 on the lock bolt, thereby allowing said lug to passthrough the gates as the bolt is projected or drawn back. It may be herenoted that the tumblers are placed above the bolt, and are accommodatedwithin a grooved or reduced thickness portion of the bolt, as shown at10. It is also noted that the front edge of the key is formed withsuitable notches 1| to engage the lever tumblers in such manner as toproperly align the several tumblers for the gate operation, and atthe-proper time.

Within the enlarged portion 69 of the key cylinder and communicatingwith the back edge portion of the key slot 68, are the outwardlyextending key pins 12 and 13; and the back edge of the key is providedwith suitable notches 14 to engage these key pins and align them whenthe key is inserted into the slot 6 8. Adjacent to the key cylinderenlargement 69 is the pin tumbler block 15, carried by the cover plate16 of the lock case, which cover plate is for that purpose provided witha suitable recess defined by the walls 11. This pin tumbler block isprovided with the pin tumblers 18 and 19 corresponding to the keycylinder pins 12 and 13, respectively, and light springs are provided tourge the pin tumblers outwardly. It is here noted that when the keycylinder stands in the normal or key out position, the pins 12 and 13are intended to substantially align with the corresponding pin tumblers18 and 19, as will presently appear.

There is a cross-wise extending retaining pin 8| in the enlargement 69and extending between the key cylinder pins 12 and 13, as well shown inFigures '7, 10 and 11; and each of the pins 12-13 and 1819 is providedwith a flattened notch portion 82 which receives the retaining pin aswell shown in Figures 10 and 11. With this arrangement the retainingpins perform two functions, they prevent the pins 12-13, and 18-19 fromdropping out of their holes, and they also prevent the pins 12-13 and'|8|9 from rotating on their axes. Both functions are important in thepresent case.

It may be here noted that the number of key cylinder pins (and thenumber of pin tumbler pins corresponding thereto) may be made as greator as small as desired, or there may be but a single one of each, sincethe multiplication of these pins merely serves to multiply thedifiiculty of unauthorizedly operating the lock.

Now it is noted that when the key cylinder stands in the normal orlocked position with the key out, the pin tumblers l8 and I9 engage theenlargement 59 and prevent the key cylinder from being unauthorizedlyturned, as by application of a pair of pliers to the projecting endportion of the key cylinder. Heretofore such engagement has been securedby the entering of the pin tumblers l8 and 19 into the holes of the keycylinder pins 12 and I3, and such engagement has of necessity impliedthe exact alignment of said pins and holes with each other. Anymisalignment of these parts might be due either to longitudinal shiftingor misplacing of the key cylinder and the pin tumbler block, or tononparallelism of these parts. It is seen that when the pin tumblerblock is carried by the cover plate of the casing as in the presentstructure, with the key cylinder journalled both in the body of thecasing and in the cover plate, there is possibility of such misalignmentoccurring, so that the pins would not properly function, andconsequently the desired locking of the key cylinder against rotationwould not be ensured when the key was withdrawn from its slot. In orderto provide against this contingency I have provided the arrangementswhich I shall now describe.

Instead of bringing the complete faces of the enlargement 69 and the pintumbler block 75 together, as in the past, I prefer to provide theseparts with companion axially extending slots 83 and 84 respectively, aswell shown in Figures 8, 9 and 10, so that axial misalignment of theparts will not prevent entrance of the pin tumblers l8 and 19 intoengagement with the enlargement 59 of the key cylinder, but said pintumblers may engage said slot 85 of the key cylinder anywhere and stillprevent rotation of the key cylinder unv alignment.

Heretofore it has been customary to provide the ends of the key pins andthe pin tumblers with rounded faces formed about the axes of these pins,but it is noted that this arrangement presents the objection that thereis only a single point of contact of each key pin with its pin tumbler.This has caused excessive wear and consequent short life of these partswhereupon they have ceased to function properly. In the present case Iprefer to form the end of each of the pin tumblers and key pins with afiat face,

and to form the key end of each of the key pins with a chisel face or aface rounded in the form of a part of a cylinder extending transverselyof the axis of the key cylinder, as shown in Figures 10 and 12, inparticular. By this means I provide a line of contact between each keypin and the edge of the key when inserted into the key slot, so thatWear will be greatly reduced, and life prolonged.

Now it will be noted that when the key pins have once forced back thepin tumblers by insertion of the key into its slot, the key cylinder maybe turned, and such turning may be continued indefinitely for one ormore turns, without re-engagement of the pin tumblers with the keycylinder, as long as the key is retained within its slot. Thus thepresent form of lock cylinder is well adapted for use in connection withthe herein described form of locking device in which it must be possibleto completely rotate the key cylinder for certain of the intendedoperations. This is accomplished without the need of using an encirclingsleeve around the key cylinder as in previous arrangements. In thisconnection it is also noted that such an encircling sleeve could not beused in the present form of device in which I make use of both pintumblers and lever tumblers for the various operations.

It is also to be noted that I have placed the tumblers of both forms atthe top side of the lock bolt, and the wedge block 43, operating andcontrolling bar 4|, and roller 42 at the back face of the lock bolt,thus securing a very harmonious arrangement, and one in which theseveral parts are brought to the lest locations to perform their severalfunctions.

Reference to Figure 1 in particular discloses the presence of a notch inthe upper edge of the lock block 25, and a lug or pin 86 on the face ofthe bar 4| in position to engage said notch when the bar 4| is loweredto a position lower than shown in Figure 1. Such engagement of the lugor pin with the notch will deadlock the bolt so that it cannot bewithdrawn by a key for unlocking purposes. Thus the movements of the bar4| to positions higher than shown in Figure 1 result in operations tounlock the bolt (or to ride free of the bolt when the latter is in thesecond projected position), whereas movements of the bar 4| to positionslower than that shown in Figure 1 result in deadlocking the lock boltwhen the bolt is in the normal locking position shown in Figure 1.

It thus appears that the following bolt operations are possible: Fromthe position of Figure 1 the bolt may be withdrawn to unlock by key whenturned counterclockwise; or the bolt may be withdrawn to unlock byupward movement of the bar 4| with consequent engagement of the roller42 with the wedge block 43; or the bolt may be projected to the secondposition (shown by the line 28) by turning the key clockwise, in whichpositionthe upward movement of the bar 4| will not affect the boltcondition; or a downward movement of the bar 4| (the lock bolt being inthe normal position shown in Figure 1) will result in engagement of thelug 85 with the notch 85 so that no key operation may then be performed.

Now it is to be noted that in the form of device shown in Figures 4 to12 inclusive, and as so far described, when the lock bolt 26 isprojected into the second or deadlocking position (shown by the line28), by a key operation,

theroller 42 rides past the back face of the wedge block 43, but doesnot engage the wedge block to retract the lock bolt; Nevertheless, underthese conditions the bar 56 will be projected outwards by the spring 51and carry the roller 59 beneath the lower end of the bar 4|, so thatsaid bar will be restrained from lowering to its normal position, and itwill remain in such raised position. If, then, an attendant should causesuch raising of the bar 4| by sending an impulse of current into thesolenoid 59, the parts would be set into such abnormal position; and ifthereafter the attendant should return the lock bolt 'to it's snaplocked position (by one turn of the key counterclockwise), the bar 4|would still remain in its raised position (the door having not beenopened), and no further impulses of current could cause opening orunlocking of the door. In order to provide against this contingency Ihave provided a block 81 on the back face of the lock bolt, which blockis in position such that when the lock bolt is projected to thedeadlocked position (of the line 28), said block 81 will stand above theroller 42 of the bar 4|, and during this condition the bar 4| cannot beraised, notwithstanding energization of the solenoid 50. Thus aninadvertent impulse of current supplied to the solenoid 50 will notraise the bar 4|, nor thereby permit the interlock bar 56 to beprojected, and no such undesirable condition as above set forth will bepossible. It is noted that the block 81 does not interfere with normalup and down movements of the bar 4| and roller 42 as long as the lockbolt stands in the snap locked position.

While I have herein shown and described only certain embodiments of thefeatures of my present invention, still I do not intend to limit myselfthereto, except as I may do so in the claims to follow.

I claim:

1. In a locking device, the combination of a lock bolt, a key operatedtumbler mechanism for controlling the bolt movements, means to withdrawthe bolt when the tumbler mechanism stands in one position and duringone direction of key movement, means to move the bolt to a secondprojected locking position when the tumbler mechanism is moved toanother position and during the other direction of key movement, andremote control means for withdrawing the bolt into unlocking positionindependently of the key movements when said bolt is in the firstmentioned position, substantially as described.

2. In a locking device, the combination of a lock bolt, a key operatedtumbler mechanism for controlling the bolt movements, means to withdrawthe bolt when the tumbler mechanism stands in one position and duringone direction of key movement, means to move the bolt to a secondprojected position when the tumbler mechanism is moved to anotherposition and during the other direction of key movement, and meansmounted for movement transversely of the bolt movement adapted to engagethe bolt for withdrawing the same into unlocking position when the boltis in normal locking position, and adapted to travel free of the boltwhen the bolt is in the second projected locking position, substantiallyas described.

3. In a locking device, the combination of a lock bolt, a key operatedtumbler mechanism for controlling the bolt movements, means to withdrawthe bolt when the tumbler mechanism stands in one position and duringone direction of key movement, means to move the bolt to a secondprojected position when the tumbler mechanism is moved to anotherposition and during the other direction of key movement, means mountedfor movement transversely of the bolt movement adapted to engage thebolt for withdrawing the same into unlocking position when the bolt isin normal locking position, and adapted to travel free of the bolt whenthe bolt is in the second projected locking position, together withmeans interconnecting said bolt and said transversely movable means fordeadlocking the bolt when said transversely movable means is moved toanother position, substantially as described.

4. In a locking device, the combination of a lock bolt, spring meansnormally projecting the same into locking position, key operated tumblermeans for permitting withdrawing said bolt into unlocking position whenthe key is turned in one direction of movement, and adapted to permitprojecting the bolt into a second projected looking position when thekey is turned in the other direction, means movable transversely of thebolt movement, interconnecting means on the bolt and said transverselymovable mean for effecting withdrawal of the bolt when said transverselymovable means is moved, the bolt being in its normally projectedposition, and ineffective to move the bolt when the bolt is in itssecond projected locking position, together with means on saidtransversely movable means for deadlocking the bolt when in either itsnormally projected or its second projected locking position,substantially as described.

5. In a locking device, the combination of a lock bolt, key operatedmeans to operate the bolt, and separate remote control means to lock thebolt against unlocking movement by key operation, substantially asdescribed.

6. In a locking device, the combination of a lock bolt, key operatedmeans to operate the bolt, and separate remote control means to withdrawthe bolt when said remote control means is moved in one direction, andto lock the bolt against key unlocking operation when said remotecontrol means is moved in the other direction, substantially asdescribed.

7. In a locking device, the combination of a locking bolt, means toproject said bolt into normal loxcking position, key operated means toproject said bolt into a second projected locking position, and remotecontrol means to withdraw said bolt into unlocking position from thenormal locking position, said remote control means being inefiective towithdraw the bolt when the bolt is in the second projected position,substantially as described.

8. In a locking dBVllCG having a lock bolt and a key cylinderco-operating therewith for key operations, means to operate and controlsaid lock bolt from a remote station, comprising a bar in the lockingdevice mounted for movement across the direction of bolt movement, awedge block on the lock bolt, a roller on the bar in position to engagethe wedge block for withdrawal of the lock bolt when the bar is moved,another member mounted for movement across the path of travel of the barand into intercepting position when the bar is moved for bolt actuationpurposes, to thereby retain the bar in its moved position, spring meanstending to retain the said intercepting member in such moved position,and means in conjunction with such intercepting member adapted forengagement with a companion part to restore'said member to its initialposition against such spring means, and thereby release the bar,substantially as described.

9. In a locking device having a lock bolt, a spring normally urging saidbolt to a projected position and a key cylinder co-operating with saidbolt to control bolt projection, means to operate and control said lockbolt from a remote station, comprising a bar in the locking devicemounted for movement across the direction of movement of the bolt,;co-operating parts on the lock bolt and said bar including cam means towithdraw the bolt when the bar is moved, a movable member mounted tomove into position to intercept restoring movement of the bar when it ismoved in bolt withdrawing direction, to thereby retain the bolt in suchwithdrawn position, a spring normally urging said member to interceptingposition and a part in conjunction with said intercepting member inposition for engagement by a co-operating part when the door opens afterwithdrawal of the bolt, to thereby move said member against said springand release the interception of the bar to permit the bolt to move toits initial position, substantially as described.

10. In a locking device having a lock bolt, a spring normally urgingsaid bolt to a projected position and a key cylinder for co-operatingwith said bolt to control bolt projection, means to operate and controlsaid lock bolt from a remote station, comprising an element mounted formovement adjacent to the lock bolt, co-operating parts on the lock boltand said element to Withdraw the bolt when the element is moved, anintercepting member movably mounted in position to intercept thereturning movement of the element and thereby retain the bolt inwithdrawn position, a spring normally urging said member to interceptingposition and another element in connection with said intercepting memberin position for engagement by another member after door movementcommences, to thereby move the intercepting member against said springand away from intercepting position and allow the bolt to return to itsnormal position, substantially as described.

11. The combination with a door, of a locking device therefor, includinga spring actuated bolt for engagement with a door part for lockingpurposes, together with means to remotely control and actuate said bolt,and including a bar mounted for movement across the direction of boltmovement, co-operating elements on the bar and the bolt adapted towithdraw the bolt against its spring when the bar is moved, anintercepting device movably mounted in position to intercept the barwhen it has been moved to withdraw the bolt, a door starter in positionto commence door opening movement when the bolt is withdrawn, andco-operating parts on the said intercepting device and the dooreffective to restore the intercepting device to initial position andthereby release the bar and allow the bolt to move to looking positionafter the door opening movement has commenced, substantially asdescribed.

12. The combination with a door, of a locking device therefor, includinga spring actuated bolt for engagement with a door part for lockingpurposes, together wtih means to control and actuate said bolt, andincluding a bar mounted for movement across the direction of boltmovement, cooperating elements on the bar and the bolt adapted toWithdraw the bolt against its spring when the bar is moved, anintercepting device movably mounted in position to intercept the barwhen it has been moved to withdraw the bolt, and cooperating parts onsaid intercepting device and the door eflective to restore theintercepting device to initial position and thereby release the bar andallow the bolt to move to locking position after the door openingmovement has commenced, substantially as described.

FOLGER ADAM.

